Cupping their hands near holes drilled for cable routing, workers at the Boeing Company’s four-acre data processing site near Seattle noticed this year that air used to keep the computers cool was seeping through floor openings.

Mindful of the company’s drive to slash electricity consumption by 25 percent, they tucked insulation into holes there and at five similar sites. The resulting savings are projected at $55,000, or some 685,000 kilowatt hours of electricity a year.

Yet Boeing’s goal is not just to save money. The hope is to keep pace with other companies that have joined in a vast global experiment in tracking the carbon dioxide emissions generated by industry.

Boeing and other enterprises are voluntarily doing what some might fiercely resist being forced to do: submitting detailed reports on how much they emit, largely through fossil fuel consumption, to a central clearinghouse.

The information flows to the Carbon Disclosure Project, a small nonprofit organization based in London that sifts through the numbers and generates snapshots by industry sectors in different nations.

By giving enterprises a road map for measuring their emissions and pointing out how they compare with their peers, experts say, the voluntary project is persuading companies to change their energy practices well before many governments step in to regulate emissions.

Scientists estimate that industry and energy providers produce nearly 45 percent of the heat-trapping emissions that contribute to global warming. While some governments are convinced that reining in such pollution is crucial to protecting the atmosphere, a binding global pact is not on the immediate horizon, as negotiations in Copenhagen showed this month.

Until broad regulation is at hand, many investors and company executives say, voluntary reporting programs like the Carbon Disclosure Project may be the best way to leverage market forces for change.